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Grease cap
#1351440 Tue Mar 24 2020 03:42 PM
Joined: May 2016
Posts: 134
J
Shop Shark
Hello. I have a 49 gmc 1 ton. Looking for a screw on grease cap for front hub haven't been able to source one anywhere. If anyone has one to sell let me know. Thanks John


1949 gmc 1-ton
Re: Grease cap
Johnny N #1351448 Tue Mar 24 2020 05:10 PM
Joined: Feb 2004
Posts: 20,164
H
Boltergeist
Can you post a photo? Depending on the design, it might be possible to duplicate one, if you have a pattern to go by.
Jerry


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Re: Grease cap
Johnny N #1351449 Tue Mar 24 2020 05:22 PM
Joined: May 2016
Posts: 134
J
Shop Shark
Ok I'll try in a bit. Had to go to doc. Ouch


1949 gmc 1-ton
Re: Grease cap
Johnny N #1351477 Tue Mar 24 2020 09:30 PM
Joined: May 2016
Posts: 134
J
Shop Shark
[img]https://www.stovebolt.com/ubbthread...ame/15850851559803497088210471563420.jpg[/img][img]https://www.stovebolt.com/ubbthread...m.e/15850851965228835675339975409861.jpg[/img] here are what the caps look like. Only have the 1. 2-5/16 diameter. 2 inches high

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Last edited by Johnny N; Tue Mar 24 2020 09:33 PM.

1949 gmc 1-ton
Re: Grease cap
Johnny N #1351504 Wed Mar 25 2020 12:35 AM
Joined: May 2015
Posts: 2,248
K
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Hmmmm. That sure looks like a piece of 2" pipe formed into a cap.
2" pipe is 2-3/8" OD with tapered threads - 11-1/2" TPI. They may taper down enough to screw on if your thread pitch is the same. The beginning of a properly cut 2" pipe thread is 2.269" diameter.
But your thread looks like it's straight rather than tapered.
Just a random thought.


Kevin
First car '29 Ford Special Coupe
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Re: Grease cap
Johnny N #1351511 Wed Mar 25 2020 01:04 AM
Joined: Dec 2001
Posts: 15,079
Boltergeist
If you don't find one, do you have a local guy with a machine shop in his back yard. He could do it in short time....and have him make two of them if you do.


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Re: Grease cap
Johnny N #1351520 Wed Mar 25 2020 02:40 AM
Joined: Aug 2001
Posts: 4,143
Shop Shark
I have to disagree Kevin.
That looks like a taper thread to me.
It might be a pipe thread?
Anybody know how many years they had that style?
I'll look at the 57 1-ton tomorrow.

Don

Last edited by 2-Ton; Wed Mar 25 2020 02:42 AM.

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Re: Grease cap
2-Ton #1351521 Wed Mar 25 2020 02:48 AM
Joined: May 2015
Posts: 2,248
K
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Originally Posted by 2-Ton
I have to disagree Kevin.
That looks like a taper thread to me.
OK, Maybe my eyeball is out of calibration. wink


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Grease cap
Johnny N #1351528 Wed Mar 25 2020 04:05 AM
Joined: Aug 2018
Posts: 368
2
Shop Shark
neat cap
i tried looking for this part in the GM parts wiki, no luck, only Chevy parts all with the press in dust cap
on my 53 gmc 1 ton, the cap is the press in type, not threaded, so is my 50 1 ton, both trucks are single rear wheel style

would this threaded cap be for the dually 1 ton?
all the photos i find of 49 1 ton's show a press in cap like my trucks
what axle option is this threaded cap from?
do you know for sure it's original?

anyway, calipers and a thread gauge will answer all our questions, straight or tapered and pitch

if you care about originality the wrecking yard is the place to go
-s

Last edited by 2ManyTrucks; Wed Mar 25 2020 04:05 AM.
Re: Grease cap
2ManyTrucks #1351532 Wed Mar 25 2020 05:00 AM
Joined: Feb 2013
Posts: 221
E
Shop Shark
Both my '48 Chevy 1-Ton dually and my '48 GMC 1-Ton dually use the same dust cap. I bought a set of stainless steel dress up caps on eBay but they were female threads, which I didn't notice until I tried to install them.

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